DIN 17173 Grade X8Ni9 quenched and tempered (+QT)
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DIN 17173 Grade X8Ni9 quenched and tempered (+QT)

Equivalent material: EN X8Ni9, DIN 1.5662, AFNOR X8Ni9, BS 1501.509, BS 50, BS X8Ni9, UNI X10Ni9, UNE XBNi09, JIS SL9N53, JIS STBL690, JIS SL9N520, JIS SL9N590, JIS STPL690, EN X10Ni9, EN 1.5662, ISO X8Ni9, ISO X9Ni9, ISO X10Ni9, ASTM A844

DIN 17173 Grade X8Ni9 quenched and tempered (+QT) general

Property Temperature Value
Density 20.0 °C Density of 7.88 g/cm³

DIN 17173 Grade X8Ni9 quenched and tempered (+QT) thermal

Property Temperature Value Comment
Coefficient of thermal expansion -100.0 °C Coefficient of thermal expansion of 1.02E-5 1/K -
- 20.0 °C Coefficient of thermal expansion of 1.1E-5 1/K -
- 100.0 °C Coefficient of thermal expansion of 1.14E-5 1/K -
- 200.0 °C Coefficient of thermal expansion of 1.18E-5 1/K -
- 300.0 °C Coefficient of thermal expansion of 1.21E-5 1/K -
- 400.0 °C Coefficient of thermal expansion of 1.25E-5 1/K -
Melting point - Melting point of 1316 - 1595 °C Typical for Nickel Steel
Specific heat capacity -100.0 °C Specific heat capacity of 442 J/(kg·K) -
- 20.0 °C Specific heat capacity of 464 J/(kg·K) -
- 100.0 °C Specific heat capacity of 479 J/(kg·K) -
- 200.0 °C Specific heat capacity of 495 J/(kg·K) -
- 300.0 °C Specific heat capacity of 511 J/(kg·K) -
- 400.0 °C Specific heat capacity of 528 J/(kg·K) -
Thermal conductivity -100.0 °C Thermal conductivity of 23.9 W/(m·K) -
- 20.0 °C Thermal conductivity of 30.2 W/(m·K) -
- 100.0 °C Thermal conductivity of 32.8 W/(m·K) -
- 200.0 °C Thermal conductivity of 34.4 W/(m·K) -
- 300.0 °C Thermal conductivity of 34.7 W/(m·K) -
- 400.0 °C Thermal conductivity of 34 W/(m·K) -
Thermal diffusivity 20.0 °C Thermal diffusivity of 8.3 mm²/s -
- 100.0 °C Thermal diffusivity of 8.5 mm²/s -
- 200.0 °C Thermal diffusivity of 8.4 mm²/s -
- 300.0 °C Thermal diffusivity of 8 mm²/s -
- 400.0 °C Thermal diffusivity of 7.3 mm²/s -

DIN 17173 Grade X8Ni9 quenched and tempered (+QT) chemical

Property Value
Carbon Carbon of 0.1 %
Manganese Manganese of 0.3 - 0.8 %
Molybdenum Molybdenum of 0.1 %
Nickel Nickel of 8 - 10 %
Phosphorus Phosphorus of 0.03 %
Silicon Silicon of 0.35 %
Sulfur Sulfur of 0.02 %
Vanadium Vanadium of 0.05 %

DIN 17173 Grade X8Ni9 quenched and tempered (+QT) electrical

Property Temperature Value
Electrical resistivity -100.0 °C Electrical resistivity of 2.51E-7 Ω·m
- 20.0 °C Electrical resistivity of 3.22E-7 Ω·m
- 100.0 °C Electrical resistivity of 3.73E-7 Ω·m
- 200.0 °C Electrical resistivity of 4.4E-7 Ω·m
- 300.0 °C Electrical resistivity of 5.19E-7 Ω·m
- 400.0 °C Electrical resistivity of 6.13E-7 Ω·m

DIN 17173 Grade X8Ni9 quenched and tempered (+QT) mechanical

Property Temperature Value Comment
Elastic modulus -100.0 °C Elastic modulus of 201 GPa -
- 20.0 °C Elastic modulus of 195 GPa -
- 100.0 °C Elastic modulus of 190 GPa -
- 200.0 °C Elastic modulus of 184 GPa -
- 300.0 °C Elastic modulus of 178 GPa -
- 400.0 °C Elastic modulus of 170 GPa -
Elongation 20.0 °C Elongation of 18 % -
Elongation, transverse 20.0 °C Elongation, transverse of 16 % -
Poisson's ratio 23.0 °C Poisson's ratio of 0.29 [-] Typical for Nickel Steel
Shear modulus 23.0 °C Shear modulus of 76 GPa Typical for Nickel Steel
Tensile strength 20.0 °C Tensile strength of 640 - 840 MPa -
Tensile strength, transverse 20.0 °C Tensile strength, transverse of 640 - 840 MPa -
Yield strength 20.0 °C Yield strength of 480 - 490 MPa -
Yield strength, transverse 20.0 °C Yield strength, transverse of 480 - 490 MPa -

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